260636489 has 4 divisors (see below), whose sum is σ = 260674320. Its totient is φ = 260598660.

The previous prime is 260636447. The next prime is 260636501. The reversal of 260636489 is 984636062.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984636062 = 2 ⋅492318031.

It is a cyclic number.

It is not a de Polignac number, because 260636489 - 2¹⁶ = 260570953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260636429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5327 + ... + 23444.

It is an arithmetic number, because the mean of its divisors is an integer number (65168580).

Almost surely, 2^260636489 is an apocalyptic number.

It is an amenable number.

260636489 is a deficient number, since it is larger than the sum of its proper divisors (37831).

260636489 is an equidigital number, since it uses as much as digits as its factorization.

260636489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37830.

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 260636489 is about 16144.2401183828. The cubic root of 260636489 is about 638.7708251834.

The spelling of 260636489 in words is "two hundred sixty million, six hundred thirty-six thousand, four hundred eighty-nine".